package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.EmployeePwdDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        employee.setPassword(DigestUtils.md5DigestAsHex(MessageConstant.DEFAULT_PASSWORD.getBytes()));
        employee.setStatus(StatusConstant.ENABLE);

        // // 时间信息
        // employee.setUpdateTime(LocalDateTime.now());
        // employee.setCreateTime(LocalDateTime.now());
        //
        // // 用户人信息
        // employee.setUpdateUser(BaseContext.getCurrentId());
        // employee.setCreateUser(BaseContext.getCurrentId());
        employeeMapper.insert(employee);
    }

    /**
     * 分页查询员工信息
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
    //     使用pagehelper
        PageHelper.startPage(Integer.parseInt(employeePageQueryDTO.getPage()), Integer.parseInt(employeePageQueryDTO.getPageSize()));
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        // 将密码改为*****
        page.getResult().forEach(employee -> employee.setPassword("*****"));
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 根据id修改员工状态
     * @param employee
     */
    @Override
    public void update(Employee employee) {
        // employee.setCreateUser(BaseContext.getCurrentId());
        // employee.setUpdateTime(LocalDateTime.now());
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.selectById(id);
        employee.setPassword("*****");
        return employee;
    }

    /**
     * 修改密码
     * @param employeePwdDTO
     */
    @Override
    public void editPassword(EmployeePwdDTO employeePwdDTO) {
        Long empId = BaseContext.getCurrentId();

    //     判断id是否一致
    //     if(empId != employeePwdDTO.getEmpId()) {
    //         throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
    //     }
        Employee employee = employeeMapper.selectById(empId);
        if (employee == null) {
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }
        String oldPassword = DigestUtils.md5DigestAsHex(employeePwdDTO.getOldPassword().getBytes());
        if (!oldPassword.equals(employee.getPassword())) {
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }
        String newPassword = DigestUtils.md5DigestAsHex(employeePwdDTO.getNewPassword().getBytes());
        employee.setPassword(newPassword);
        // // 设置更新时间
        // employee.setUpdateTime(LocalDateTime.now());
        // // 设置更新人
        // employee.setUpdateUser(empId);
        employeeMapper.update(employee);
    }
}
